#include <sys/types.h>
#include <fcntl.h>
#include "ourhdr.h"

int main(int argc, char * argv[]) {
    int accmode, val; 
    if (argc != 2) 
        err_quit("usage: a.out <descriptor#>");
    if ((val = fcntl(atoi(argv[1]), F_GETFL, 0)) < 0)
        err_sys("fcntl error for fd %d", atoi(argv[1]));
    
    accmode= val & O_ACCMODE;
    if (accmode == O_RDONLY)
       printf("read only");
    else if (accmode == O_WRONLY)
        printf("write only");
    else if (accmode == O_RDWR)
        printf("read write");
    else 
        err_dump("unknown access mode");

    if (val & O_APPEND)
        printf(", append");
    if (val & O_NONBLOCK)
        printf(", nonblocking");
#if !defined(_POSIX_SOURCE) && defined(O_SYNC)
    if (val & O_SYNC)
        printf(", synchronous writes");
#endif
    putchar('\n');
    exit(0);
}
